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AP Biology/Unit 7: Natural Selection
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Amino Acid Chirality and Abiotic Origin
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Analysis of amino acids from a meteorite sample indicates equal proportions of L- and D-enantiomers. Which statement best explains why this finding supports an abiotic origin for these molecules over an origin based on contamination from Earth?

A

Meteorites contain minerals not found on Earth

B

Meteorites have been exposed to extreme temperatures

C

Biological systems predominantly use L-amino acids

D

Space environments have higher radiation levels

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